A study of austenitization of SG iron

Austenitization process of three SG irons with varying compositions and as cast matrix microstructure has been studied at three austenitization temper atures of 850, 900 and 950C for different time periods. Microstructure, har dness and X-ray diffraction have been used to reveal the nature of dependen ce of the process on austenitization temperature, time and as cast structur e. The optimum austenitization time is maximum for ferritic and minimum for pearlitic matrix.